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Energy Storage Device

A technology for storage components and conductive components, applied in electrical components, battery pack components, circuits, etc., can solve problems such as increased resistance, unstable shape of welding parts, unreliable welding, etc., and achieve the effect of maintaining storage performance

Inactive Publication Date: 2017-03-08
GS YUASA INT LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, when directly soldering a terminal and a conductive member or a current collector and a conductive member, the crimped portion of the conductive member, that is, the bent portion, is welded. Since the shape of the welded part is unstable, reliable welding may not be possible.
If the welding is unstable, there may be looseness between the terminal and the conductive member or between the current collector and the conductive member due to vibration or shock
This slack causes an increase in resistance, making it impossible to fully utilize the power storage performance of the power storage element.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0068] First, the configuration of the power storage element 10 will be described. figure 1 It is a perspective view schematically showing the appearance of the electricity storage device 10 according to the embodiment of the present invention. figure 2 It is a perspective view showing each component included in the electricity storage element 10 by separating the container main body 111 of the container 100 of the electricity storage element 10 according to the embodiment of the present invention. In addition, in these figures, the Z-axis direction is shown as the up-down direction. In the following, the Z-axis direction may be described as the up-down direction. The Z-axis direction is not limited to being the up-down direction. The same applies to subsequent figures.

[0069] The power storage element 10 is a secondary battery capable of charging and discharging electric power, more specifically, a nonaqueous electrolyte secondary battery such as a lithium ion secondary ...

Deformed example 1

[0114] Next, Modification 1 of the above-mentioned embodiment will be described. In this modified example, through-holes are formed in the first fixing member and the second fixing member. In addition, in the following description, the same code|symbol is attached|subjected to the same part as the above-mentioned embodiment, and the description may be abbreviate|omitted.

[0115] Figure 8 It is a cross-sectional view showing a schematic configuration of the conductive member 300 , the first fixing member 600A, and the second fixing member 800A according to Modification 1 of the present embodiment. in particular, Figure 8 With Figure 5 corresponding figure.

[0116] Such as Figure 8 As shown, a through hole 660 is formed in the covering portion 610a of the first fixing member 600A. The through hole 660 is an opening having a circular shape in plan view. Specifically, the through hole 660 is a circular shape substantially coaxial with the circle formed by the ridgelin...

Deformed example 2

[0118] Next, Modification 2 of the above-mentioned embodiment will be described. In this modified example, one fixing member is provided for one conductive member. In addition, in the following description, the same code|symbol is attached|subjected to the same part as the above-mentioned embodiment and a modification, and the description may be abbreviate|omitted.

[0119] Figure 9 It is a cross-sectional view showing a schematic configuration of the conductive member 300 and the first fixing member 600 according to Modification 2 of the present embodiment. for Figure 9 The shown conductive member 300 is provided with the first fixing member 600 but is not provided with the second fixing member 800 . Figure 10 It is a cross-sectional view showing a schematic configuration of a conductive member 300 and a second fixing member 800 according to Modification 2 of the present embodiment. for Figure 10 The shown conductive member 300 is equipped with the second fixing memb...

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PUM

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Abstract

The present invention provides an energy storage device which can maintain energy storage performance for a long period by suppressing loosening of connection between a terminal or a current collector and a conductive member. An energy storage device includes: a container; a terminal disposed outside the container or a current collector disposed inside the container; a conductive member penetrating the container and connected to the current collector or the terminal; and a fixing member joining the current collector or the terminal and the conductive member to each other.

Description

technical field [0001] The present invention relates to an electric storage element. Background technique [0002] There is known an electricity storage element in which a terminal provided outside and a current collector arranged inside a container are connected via a conductive member. Furthermore, by welding the terminal and the conductive member or the current collector and the conductive member, the connection strength between the terminal and the conductive member or the connection strength between the current collector and the conductive member is ensured (for example, refer to Patent Document 1). . [0003] patent documents [0004] Patent Document 1: Japanese Patent Laid-Open No. 2012-28246 [0005] However, when a terminal and a conductive member or a current collector and a conductive member are directly welded, the crimped portion of the conductive member, that is, the bent portion is welded, and since the shape of the welded portion is unstable, reliable weld...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/30
CPCH01M50/543Y02E60/10
Inventor 道畑良太志筑隆弘太田直树
Owner GS YUASA INT LTD